Cap for containers



5M: 2?, w H. z. @GRA ZQQM@ CAP FOR CONTAINERS Fi'ledrnec. 5o, 1944 ,494/Y Z s. 32

,y c 1 3/ lfnlllllllll 27d, i iN mmml' Z7 53a /ly INVENToR /Vfjy Z. 60%@ATTORNEYS Patented Dec. 27, 1949 CAP FOR. CONTAINERS Henry Z. Gora,Stratford, Conn., assigner to The Gora-Lee Corporation, Stratford,Conn., a corporation of Connecticut Application December 30, 1944,Serial No. 570,539

9 Claims.

This invention relates to lids or caps for use with containers, jars,bottles and the like. This application relates more particularly to capsof the types having flanges extending down over peripheral surfaces o'fthe mouths of the con tainers, for purposes of sealing the latter.

This invention is shown herein by way oi example in connection withwide-mouthed con -tion with other containers, as for instance cans orjars for industrial liquids, paints, corrosive fluids and the like.Considering the latter Where there is a possibility of a iiuid attackingand destroying the material of the cap, the invention is of particularadvantage in preventing such deleterious action.

Heretofore in connection with containers for foodstuffs it was commonpractice to coat metallic caps for the containers with lacquer orpaints, so that the metal of the caps was isolated from the containercontents and prevented from corroding and contaminating said contents.In some instances the metals, if bared for any reason, would have anundesirable eiect on the contents of jars, imparting a metallic tasteeven though no corrosion was present. Usually such caps or lids, for thesake of economy, have been made of iron which corrodes very easily, andas a result it was extremely important to have a -protective coatingAwhich was eiective at all times to isolate the iron from the jarcontents.

I have found that very often during handling -of these prior caps, thecoatings would become marred orl scratched, especially if the sharpedges of a fiange of one cap happened to come in Ycontact with thecoating of another cap. Even 'of the latter and render same undesirablefor use.

In the past the provision of such protective coatings on caps has beendone in a separate lie operation. While the cost of this operation oneach cap might be small, when it is considered that there are millionsof caps coated daily, the total cost oi the operation in time, equipmentand material, becomes an important factor.

In some instances contamination of the contents oi a jar would occurwithout apparent failure of the coating due to scratches and the like,the fault being ultimately traceable to an imperfect seal, which mightbe caused in some cases by a faulty coating in the region between thesealing ring or gasket and the material of the lid, and in other casesby imperfections of contact between the gasket and container surface.

The present invention obviates these diiculties and disadvantages ofprior caps and lids in an effective and economical manner, by providinga cap having a resilient and tough scratchresistant protective coatingof rubber, gasketlike material covering the entire surface of the capwhich might come in contact with the contents oi a jar. The coating hasa portion in the shape of a diaphragmatic membrane which may be formedof material similar to that used for jar-sealing rings, the membranebeing preferably bonded or adhered to the inner surface of the cap .tobecome a unit therewith. When so formed, the membrane is tough andscratch-resistant, and also resilient so that it will not readily chipor peel off, or be broken by scratching and the like. Another portion ofthe coating is in the form of an annulus or gasket extending along theinside of the flange of the cap, shaped to engage the container in theregion of its mouth, so that a positive and eiiective grip upon a sealagainst the container is thereby provided, as well as a positiveisolation of the material of the cap from the container contents. Thusthere is effectively prevented the contamination of foodstuis in a jardue to accidental exposure o! same to the material of the cap, or toimperfect sealing..

In the forms of the invention disclosed herein, the gasket or annulusportion of the coating is shaped to engage the container along aplurality of separate zones in the region of the container mouth, sothat at least a multiple sealing of the contents is accomplishedthereby.

In one illustrated form, both the fiat upper surface of the mouth edgeand the outer convex surface of the container in the region of said edgeare engaged by the gasket or annulus portion to form separate seals. Inanother illustrated form. the outer convex surface of the containeralong two separatezones is engaged by the gasket portion. In both formsthere-ls thus a double sealing engagement between the coating of the capand the surfaces of the container, and, since the membrane portion ofthe coating dams or closes over the opening of the annular portion, acomplete hermetic and posi- .tive sealing of the container contents, andisola tion of the latter with respect to the lid material, isaccomplished.

In the preferred forms of the invention shown herein the membrane is.made integral with a sealing ring or gasket extending along the insidesurface of the depending flange of the cap, so that the only place wherethe sealing of the jar relies upon pressure between contacting surfacesof dissimilar materials is at the jar mouth, and not in the lid. Sinceat this place the sealing ring or gasket effects agdouble sealing, itbeing under deforming compression when the cap is applied to thejar,'positive assurance is had at all times of a perfect hermetic seal.The shape of the cap and gasket are such that the latter demountablysecures the cap to the container, holding it in place againstinadvertent removal.

Preferably one seal constitutes the means for retaining the cap on thejar while the other seal merelyperforms its sealing function andtherefore may be formed to have a more resilient or flexible engagementwith the jar than the seal which also retains, so that a closeconformity of the exible seal t the jar surface is had regardless ofslight variations of the latter inherent in its manufacture.

According to the present invention the. membrane and sealing ring of thecap are preferably processed by a single operation in place on thelatter, and are thus bonded to the material of the cap body and flange,and there is avoided by this arrangement the necessity of employing twoseparate operations, one for coating the cap withlacquer or othermaterial and the other for applying the sealing gasket. The moldedsealing ring or gasket is rmly anchored to the cap in this manner, andprevented from being displaced before or during its application to thejar. Also, when reapplying the cap to the jar after it has been removed,the sealing ring is always firmly held, enabling the cap to be used as areplaceable cover until the jar is emptied or discarded.

By having the membrane and sealing ring in one continuous piece there isprevented any likelihood of liquid or food from the container lodging inback of the ring to discolor or decompose after the jar has once beenopened, as is the case with caps having painted insides and separaterings.

The present invention is not limited to metal caps or lids, since it maybe used with caps made of plastic or other materials. While caps ofthese materials may be formed to have the requisite structuralcharacteristics, the materials of which they are made might have anadverse effect on the flavor and keeping qualities of food incontainers. However, by the provision of a membraneand gasket ring madeaccording to the invention, the contents of the containers are preventedfrom coming in contact with material of the lid so that the latter maynot affect the contents.

Other features and advantages will hereinafter appear.

In the accompanying drawings:

' Figure 1 is a side elevation of one type of .con-

taincr and cap to which the present invention may be applied.

Fig. 2 is a fragmentary enlarged section taken through a peripheralportion of the cap as made in accordance with the invention.

Fig. 3 is a fragmentary enlarged section taken through a portion of themouth of the container and cap shown in Fig. 1, illustrating the doubleseal provided by the sealing ring of the cap.

Fig. 4 is a diametric section of a. modification of the cap shown inFigs. 1, 2 and 3.

Fig. 5 is a side elevation of another type of container and cap to whichthe present invention may be applied.

Fig. 6 is a fragmentary enlarged peripheral section of the cap of Fig.5.

Fig. 7 is a fragmentary enlarged section taken through a portion of themouth of the container and cap shown in Fig. 5, illustrating the doubleseal provided by the sealing ring of the cap.

Fig. 8 is a diametric section of the cap shown in Figs. 5, 6 and 7, madein accordance with the. invention.

Fig. 9 is an enlarged fragmentary peripheral section of a capillustrating another form of the invention. A

Fig. 10 is an enlarged fragmentary section taken through a portion ofthe mouth of a container having the cap of Fig. 9, and

Fig. 11 is a diametric section of the cap shown in Figs. 9 and 10.

`lIn the packing of food products such as preserves, jellies, preparedfoodstuffs, and the like for consumption at a later date, containers arecommonly 'employed which are adapted for use with peripherally-anged,press-fitting lids or caps. These caps are generally provided withgasket rings extending along the insides of the flanges for engagementwith the mouths of the containers to securely demountably retain thecaps on the containers and seal the contents of the latter so that theyare air-tight.

Referring to Figs. 1 and 3, a jar I0 of such type is shown comprising abody II and mouth portion I2. As shown in Fig. 3, the mouth portion I2has a flat top edge I3, a generally conical outside peripheral surfaceI4 and an annular rib I5 which latter cooperates with the gasket of thecap to seal and make air-tight the container and also removably hold thecap in place. The conical peripheral surface I4 is shaped to enable acap to be applied to the containers by a pressfitting operation, byfunctioning to spread the sealing gasket somewhat as the cap is forcedon.

Containers such as the jar I0 are usually ernployed with flanged capsmade of metal, these caps having rubber or rubber composition rings orgaskets extending along the inner surfaces of the flanges for engagementwith the retaining and sealing ribs of the jars. During application oi'such a cap to a filled container the ring ex tending along the capflange is compressed and deformed so that it embeds the retaining rib,providing an air and liquid-tight seal. The caps are usually appliedwith a downward pressure, and in some cases after the cap has beenforced into place the depending flange is curled inward to moreeffectively seal the container and retain the cap thereon.

Prior to this invention the underside of the caps have been coated inaseparate operation with lacquer, or paint, so that the metal of the capis not directly exposed to the action of the container contents or ofthe trapped air under the cap which might otherwise ultimately causecorrosion of the metal and contamination of the said contents. After thecoating, a ring or gasket is applied to the cap, its purpose being tohermetically seal the container. Such procedure, however, has not alwaysproved satisfactory in practice, as above pointed out. The disadvantagesand undesirable characteristics of these prior caps are obviated by thepresent invention.

According to this invention in the preferred forms illustrated herein,the entire inner surface of a cap I6, Figs. 2 and 3, instead of havingan exposed coating of lacquer or paint, which is particularlysusceptible to scratching, is provided with a resilient and toughcoating of acid-resistant and abrasion-resistant material such asrubber, natural or synthetic, or rubber-containing compound in the formof a membrane II, and a sealing and retaining gasket I8 having anhermetio or sealing connection with the membrane and extending along theinner surface of the depending flange I9 of the cap. The gasket I8may beof exactly the same material as the membrane II and may be integraltherewith as shown, so that the gasket and membrane together form aunitary sealing member coated over the entire inner and undersurface ofthe cap I6.

In the forms of the invention illustrated herein, the gasket I 8 isshaped in such a manner that it has two portions -.which engage thesurface of the container I at the mouth I2 along two separate zones ofcontact so that a double sealing is had. One portion of the gasket,whose function is mainly to seal, has a comparatively thin section sothat it may have great flexibility and thereby closely conform at allpoints to the surface of the container, While the other portion of thegasket, functioning both to seal and retain the cap on the container, isof thicker section, and less flexibility. This double sealing togetherwith the membrane I'I damming the opening of the gasket, makes thecontainer effectively air and liquid-tight. Since the gasket I8 may beintegral with the membrane I'I a positive isolation of the metal of thecap I6 from the contents of the container I0 may be effected, as well asa perfect seal.

As shown in lliigs. 1, 2 and 3, the invention is applied to a 'cap I6having a stepped peripheral ange i6, a small-diameter portion I9a ofwhich is directly connected with the body iSd of the cap, and alarge-diameter portion I9b of which is joined to the portion Mia by ashoulder i90.

The gasket i8 comprises a portion I8a of substantially heavy rectangularsection extending along and engaging the portions ISb and Ic of thefiange I9. and a portion i822 of lighter some'- what triangularcross-section extending along the junction line of the flange portionslila and I9c. The gasket portions Ita and I8b may be integral with eachother as well as with the skin-like membrane I 'I, which latter inaddition to covering the underside of the body portion 19d of the cap,extends along the inner surface of the ange portion I9a as shown.

lWhen the lid I6 is press-fitted on the container as shown in Fig. 3 theportion I8a of the gasket I8 engages and completely embeds the rib I5 ofthe container mouth, and the portion I8b of the gasket is engaged andcompressed by the conical surface I4 of the container mouth.

The portion I 8b of lighter cross-section functions mainly as a seal,and since it has great ilexibility.. it closely conforms to the surfaceI4 of the container regardless of yvariations of the`latter incidentalto manufacture. The portion I8a of comparatively heavy cross-sectionalso seals against the rib I6. but due to its mass and the fact that itcompletely embeds the rib I5, it serves primarily to retain the cap inplace against accidental removal. By this construction a double sealingis accomplished by the two portions It and I6b of the gasket.

The membrane I1 and gasket I8, both being of tough and resilientmaterial, are not easily scratched 'or broken by incidental contact withthe flanges of other caps or by other abrasive surfaces, andy thereforethere is no danger of damage to the protective coating of the lid duringhandling., By making the gasket il and membrane I'I integral with eachother, the only place where the sealing of the container is dependent onengagement between two different materials is at the mouth of thecontainer, where the latter engages the, gasket. However, at this pointconsiderable pressure exists due to the backing-up of the gasket by theflange I9 of the cap, and therefore an effective hermetic seal isprovided at all times. Since the gasket Il is joined with the membraneI'I there is no likelihood of leakage into or out of the container pastthe engaging surfaces of the gasket and the metal of the cap, as in capsmade prior to the invention. Contamination of the contents of acontainer from'this cause is thereby not possible.

In the broader aspects of the present invention the gasket I8 and themembrane I'I may be molded to the cap I6 in a single operation, or theymay be formed as a separate integral sealing unit to be inserted in thecap at a later time. Where, as is common practice, the caps are to bediscarded after having served their purpose,

with one particular container it may be preferable to compound therubber material of the gasket and membrane in plastic form, and moldsame directly on and to the cap so that the material is securely bondedand adhered in place.

If the gasket I8 and membrane I'I are molded to the cap I6 in a singleoperation there is thus eliminated the separate operation heretoforeemployed in coating caps with lacquer, paint, and the like before thesea-ling ring is applied, and a consequent saving is therebyrealizedfrom this arrangement, in addition to the improved resultsalready mentioned.

In other instances it may be desirable or necessary to have the sealingunit comprising the gasket I8 and membrane I1 removable from the cap,and if this is the case the unit may be bonded or cemented to the cap inother ways to hold it in place.

While the present invention is shown in connection with a metallic capI6 by way of example, it may be advantageously used in connection withcaps of plastic or other material as well. Plastic materials very oftenhave a com position adversely affecting the flavor of food. and since,according to this invention, the ma terial of the cap is completely andeffectively isolated from the contents of the container, suchdeleterious results may be obvia-ted by the application of the inventionto plastic caps.

As may be seen in Figs. 2 and 3, the membrane I7 of the cap I5 iscomparatively thin, and I have found that a thickness of approximately.005" is satisfactory for effectively isolating the material of the capfrom the contents of the container. Also by the use of a comparativelythin membrane, the gasket portion I6 of the coating is relatively freeto,be compressed and distorted as is necessary to enable the cap to beapplied to the mouth of the container.

fo'od or other contents of the container lodging'A between the gasket I8and the metal of the cap,

as is often the case with 'caps having separate sealingrings or gasketswherein the distortion of the latter raises an edge and causes a creviceto be formed. Since the gasket I8 and membrane I1 may be integral, andare tough and resilient, no such crevices result from distortion of the'gasket, to cause putrefaction before or after the container has beeninitially opened.

' Another form of the invention is shown in Fig. The lid 28 illustratedhere is substantially similar to the lid I6, it having a membrano-isabrasion-and-acidresistant coating 2I and integral stepped. gasket orring 22 which latter provides a double seal by its engagement with thecontainer mouth. However, according to this form of the invention thecomparatively sharp edge 23 of the stepped peripheral flange 24 of thecap is turned inward at an angle as shown, so that the likelihood of aperson who handles the container being cut or abraded by the edge isconsiderably reduced.

4In the forming of the lid 20 from sheet metal, the usuai procedure isto blank' out a circular plate of correct size from a sheet or ribbon ofthe metal, and Vdraw the 'blank to produce the peripheral stepped flange24. In so doing, the raw edge of the blanked plate becomes the flangeedge 23, this edge being more or less rough and apt' tov producescratches and cuts.

' However, by turning in the flange edge 23 it is brought closer to theinside circumference of the gasket .22, and the latter is then made tocover the raw edge more or less in its entirety. The edge 23 is thuscoveredV so that it will not cut-.the -hands of a person handling thecontainer, and is also protected to a considerable extent fromcorrosion.

In addition, the intumed edge 23 reinforces or backs-up the gasket 22 sothat when the latter isengaging and embedding the retainer rib I5 of thecontainer, a more secure retention vof the cap'on the container is had.-

The cap may be advantageously formed from sheet metal stock havingprenished surfaces. The stock may have both surfaces finished or onlyone surface, and in the latter case the finished surface mightconstitute the outside or upper surface of the cap, the unfinishedsurface, being coated with the membrane I1 and gasket I8l resistingcorrosion as a result.

The finish of the surfaces of the sheet metal stock for the cap may bein the form of plating, as -for instance, copper, nickel, or tin, or itmay be in the form of a lacquer, or other coating especially adapted towithstand forming opera.- tions. In the event that the cap is made fromsheet stock having. both surfaces preflnished,'the only portion of thecap in which the metal would be exposed is at the intumed edge 23. Sincethis edge is turned in and the exposed metal entirelyl covered by thematerial of the gasket 22, corrosion of the metal is largely, if notentirely prevented.

In Figs. 5 through 8 the invention is shown applied to a type ofcontainer and cap lwherein the latter has a straight dependingperipheral flange. This type of container and cap represents aneconomical shape, from the standpoint goilnitial tool costs, and alsomaintenance of the s. As shown, the container 25 has a generallyconical-shaped body portion 428 and a mouth portion 21 includinga'peripheral bead or rib 28 extending around its outer surface. The cap28 carried by the container 25 comprises a body portion 30 in the formof a fiat metal plate and a straight depending peripheral flange 3lintegral with the body portion 30.

According to the invention the entire inside surface of the cap 28 iscovered with a tough resilient acid and abrasion resistant coatingcomprising a skin-like membrane 32 covering the inner surface of thebody portion 30, and an annular gasket 33 intimately connected with themembrane and adapted to engage the mouth of the container 25. Y

In this form of the invention the gasket 33 comprises a portion 33a oflarge diameter which is substantially' rectangular in section, and aportion 33h of smaller diameter integral with the portion 33a andextending along the inside of the latter, adjacent the body 30 of thecap. The portion 33h of the'gasket is shown as being integral with themembrane 32, and the entire coating is formed of a tough resilientgasket material such as rubber, natural or synthetic, or orrubber-containing composition.

Referring to Fig. '7, when the cap 29 is pressfitted over the mouthportion 21 of the container, the gasket portion 33a is deformed andembeds the bead 28 of the container, securely holding the lid in placeagainst accidental removal, and sealing the container so that it is airand liquid-tight. In addition, the rib or portion 33h of the gasketengages the top substantially flat surface 21a of the container underdeforming pressure, forming a second seal at this point. Thus, thegasket 33 engages the mouth portion 21 of the container along twoseparate zones, to effect a double seal thereby, one of the zones beingthe bead 28 and the other being the upper surface 21a of the mouthportion. Since the gasket 33 is sealed to the membrane 32 by virtue ofthese parts being integral, a complete isolation of the material of thecap 28 is effected with respect to the contents of the container 25 andcontamination of foodstuls in the container from such causes asimperfect sealing, corrosion of the metal of the cap 29, and contact ofthe metal with the said contents is thereby effectively prevented. ItWill be readily understood that the coating comprising the membrane 32and gasket 33 effectively prevents corrosion of the inner surfaces ofthe cap 28, especially if the membrane and gasket are molded against andbonded to the cap as is preferable for many uses.

In Figs. 9, 10 and 11 another form of the invention is illustrated, inconnection with caps having straight peripheral flange and containershaving simple cross-sectional shapes at their mouths. The cap 34illustrating this form of the invention comprises a body portion 35 anda depending peripheral flange 36. The inside of the cap 34 is providedwith a tough and resilient coating comprising a membrane 31 and integralgasket 38, the latter having a stepped inner surface. That is, thegasket 38 has a portion 38a of large diameter and an integral portion38h of smaller diameter constituting a shoulder, adjacent theundersurface of the body 35. The membrane 31 and portions 38a and 38h ofthe gasket are preferably integral with each other and molded as a unitagainst the inside of the lid to be securely bonded thereto. althoughthey may be formed separately from the lid and secured to the latter ata later time by suitable adhesive if necessary,

or by the application of heat which may vulcanize the material of thecoating.

As shown in Fig. when the lid 34 is applied to the mouthportion 39 of acontainer the portion 38a of the gasket encircles the outside peripheralsurface of the mouth portion 39 and conforms in shape to the latter sothat a tight seal is thereby effected, and also a retention of the lidon the container. The shoulder portion 38h of the gasket engages the topfiat surface 39a of the container edge and is deformed an extent asshown, the pressure and contact maintaining a tight seal at this pointalso.

Variations and modicatlons may be made within the scope of thisinvention and portions of the improvements may be used without others.

I claim:

1. A container having an exterior rib-like portion adjacent the mouththereof and a closure therefor including a diaphragmatic sheet-like capstructure having a membrane of resilient rubber material covering itsinside surface; and gasket means of resilient rubber material havingspaced sealing portions for engaging the exterior surface of thecontainer along two separate zones' in the region of its mouth, toprovide a double seal thereby, one of said portions cooperating withsaid rib-like portion to secure the closure to the container, said meansextending along the periphery of the cap and having a sealing connectionwith the membrane.

2. A closure for a container, comprising a substantially flat platehaving a stepped peripheral flange, the flange having a portion ofsmaller diameter adjacent the plate and a portion of larger diameterspaced from the plate; a skinlike coating of gasket material secured tothe undersurface of the plate and to the inner surface of the portion ofthe flange of smaller diameter; and a comparatively thick band extendingalong the inside surface of the remainder of the liange, said band beingshaped to engage the outer peripheral surface of the container along twoseparate zones in the region of the container mouth to provide a doubleseal thereby, and said coating and band having a sealing connectionwhereby the contents of the container are prevented from coming incontact with the material of the plate and flange.

3. A cap for a container, comprising a plate having a dependingperipheral ange and a coating of resilient rubber material secured tothe inside of the plate, said coating comprising a skin-likediaphragmatic membrane extending across and bonded to the undersurfaceof the plate and an annulus secured to the membrane for sealingengagement with the container, and said annulus having acircumferentially extending container-engaging shoulder whereby theannulus engages the surface of the container along two separate zones inthe region of the container mouth to provide a double seal thereby, oneof said sealing portions also securing the cap to the container.

4. A flanged cap for a container having exteriorly disposed projectionsadjacent the mouth thereof, comprising a comparatively thindiaphragmatic membrane of acid-resistant gasket material bonded to theundersurface of the cap and adapted to extend across the containergreater flexibility for sealing engagement along arzone adjacent themouth of the container, and a portion of lesser flexibility forengagement with exteriorly disposed projections on the container along azone separated from the zone of sealing engagement, to retain the cap inplace on the container.

5. A closure for a container comprising a diaphragmatic sheet-like capstructure having a membrane of resilient rubber gasket material coveringits inside surface; and an annulus of resilient rubber materialextending along the periphery of the cap and having a sealing connectionwith the membrane, said annulus having a container-engaging portion ofcomparatively light section and great flexibility for sealing engagementalong a zone adjacent the mouth of the container, and acontainer-engaging portion of comparatively heavy section and lessexibility for engagement with the container along a zone separated fromthe zone of sealing engagement, to retainthe closure in place on thecontainer.

6. A closure for a container, comprising a cap and a skin-like gasketdisk having an annulus of resilient rubber material extending along theperiphery of the cap and having a containerengaging portion ofcomparatively light section and great fiexibility for sealing engagementalong a zone adjacent the mouth of the container, and acontainer-engaging portion of comparatively heavy section and lessflexibility for engagement with the container along a zone separatedfrom the zone of sealing engagement, to retain the closure in place onthe container.

7. A sealing element for use between the mouth portion of a containerand a flanged cap for the container, comprising a comparatively thindiaphragmatic membrane of resilient'rubber gasket material adapted toextend across the container mouth adjacent the undersurface of the cap;and an annulus integral with the membrane and extending around theperiphery of the latter, said annulus having a container-engagingportion of comparatively greater flexibility for sealing engagementalong a zone adjacent the mouth of the container, and acontainer-engaging portion A of comparatively heavy section and lesserflexibility for sealing engagement with the container along a zoneseparated from the first-mentioned zone of sealing engagement, saidportion of heavy section serving to retain the cap on the container.

8. ln a flanged cap for a container having an exterior-ly disposedprojection adjacent the mouth thereof, an annulus of resilientacid-resistant gasket material disposed within and bonded to the flange,said annulus having a portion of comparatively greater flexibility forsealing engagement along a zone adjacent the mouth of the container, anda portion of lesser flexibility for engagement with the exteriorlydisposed projection on the container along a zone separated from thezone of sealing engagement, to retain the cap in place on the container.

9. A sealing element adapted to extend over the mouth portion of acontainer, and be enclosed by a flanged cap for the container,comprising an annulus of resilient rubber material having an internalportion of comparatively great flexibility provided with acontainer-engaging face for sealing engagement along a zone adjacent themouth of the container, and a portion of comparatively heavy section andlesser flexibility provided with an inner container-engaging face forsealing and retaining engagement 141 with the container along n :oneseparated from Number the first-mentioned zone of sealing engagement.1,909,406 HENRY Z. GORA. 1,956,012 2,078,132 -REFEBENCEB 2,096,428 Thefollowing references are of recordf ln the le of this patent: l2'3651'737 UNITED STATES PATENTS 213901561 Number Name mbe 905 l0'785,116 A Perry ..-169.321, 1

1,176,989 Rogers et al. Mar. 2s, 190s Nutggew 1,488,567 Tauaferro Apr.1, 1931C 8 1,671,903 Jaeger May 29, 1928 l2 Name Date Holland May 16,1933 Egan Apr. 24, 1934 Fergusson Apr. 20, 1937 Hogg et al Oct. 19, 1937Carvalho Nov. 28, 1939 Punte Aug. 24, 1943 White Dec. 26. 1944 StaplesDeo. 11, 1945 FOREIGN PATENTS Country Date :Q1-eat Britain July 24. 1939

